location where the first electric elevator was demonstrated

(a)  

demonstrated the first "safety elevator"

(a)  

are generally used in buildings where several peak periods of traffic occur each day

(a)  

Types of elevators

(a)  

vertical passageway of car and counterweights

(a)  

a cage light metal supported on a structural frame, the top member which the cables, that carry the car are fastened

(a)  

are the means for lifting or lowering the car

(a)  

these are rectangular blocks of cast iron stacked in one frame which is fastened to the opposite ends of the cables to which the car is fastened

(a)  

are vertical tracks that guide the car and the counterweights

(a)  

are room usually placed directly above the shaft in which the elevator machine is housed

(a)  

a combination of push buttons, contracts, relays, and devices, operated manually or automatically to initiate door opening, starting acceleration, retardation, levelling and stopping of the car.

(a)  

mounted directly on the shaft of the elevator machine

(a)  

is designed to stop an elevator car automatically before car speed becomes excessive

(a)  

are located a few feet below and above safety travel limits of elevator car

(a)  

are placed at the bottom of the elevator pit, not to stop a falling car, but to bring it to a partially cushion stop if the car should overshoot the lower terminal

(a)  

a room housing the hoisting machinery, control equipment, and sheaves for raising and lowering an elevator car

(a)  

the structural steel frame of an elevator car to which are attached the platform, guide shoes, elevator car safety, hoisting cables and control equipment

(a)  

a light usually over the entrance to an elevator on each floor of a multistory building that signals the approach of the elevator

(a)  

a signaling apparatus in an elevator car or at a landing that displays a visual indication of floor landings

(a)  

a plus button for requesting an elevator

(a)  

a safety device for preventing the operation of an elevator car unless the hoist way door is locked in the closed position

(a)  

a safety device for preventing the operation of an elevator car unless its door or gate is fully closed

(a)  

also called plunger elevators

(a)  

it is raised by means of a movable rod nor plunger rigidly fixed to the bottom of the car

(a)  

a small freight elevator or lift intended to carry objects rather than people

(a)  

supporting cables pass over the sheave in grooves and connect to the counterweights

(a)  

cables first wrap over the traction sheave T, then around the secondary or idler sheave S, and once more going around T and S to the counterweights

(a)  

This 2:1 roping, has a mechanical advantage of 2, which results in a high-speed, low-power and therefore, low-cost traction machine

(a)  

is used where the elevator machine is located at the basement

(a)  

consists of a DC motor, the shaft which is directly connected to the brake wheel and to the driving sheave

(a)  

this type of machine employs a worm and gear between the driving motor and the sheave

(a)  

simples of passenger operated automatic control system, It handles only one call at a time providing an uninterrupted trip for each call

(a)  

control is arranged to collect all waiting up calls on the trip up and all waiting down calls on the trip down

(a)  

this system is used to control not only single elevators but an entire group or banks of cars

(a)  

used where large numbers of people are scattered throughout a given area and on a large number of floors

(a)  

a welded steel frame which supports the moving stairway equipment

(a)  

are steel angles attached to the truss on which the step rollers are guided thus controlling the motion of the steps

(a)  

provide the motive power for the unit

(a)  

consists of contractors, relays and a circuit breaker

(a)  

this shuts off the wall way at a given floor, thus preventing the spread of fire upward through escalator wells

(a)  

are closely spaced, high-velocity water nozzles which will, in the case of fire, form a compact water curtain to prevent smoke and flame from rising through the well ways

(a)  

Consists of fire proof baffles surrounding the well way, extending downward about 20" below ceiling level

(a)  

well way floor openings have a duct on each floor equipped with a number of smoke pick up relays

(a)  

Any various forms of mass transit as moving sidewalks or automated driverless vehicles, used for shuttling people around airports or in congested urban areas

(a)  

a power-driven, continuously moving surface, similar to a conveyor belt, used for carrying pedestrians horizontally or along low inclines

(a)  

a platform mounted on a steel guide rail and driven by an electric motor used for raising or lowering a person or moving along a stairway. Also called stair lift

(a)